For the following true conditional statement, write the converse. if the converse is also true, combine the statements as a biconditional. if x = 7, then x2 = 49. a. if x2 = 49, then x = 7. true; x^2 = 49 if and only if x = 7. b. if x2 = 49, then x = 7. true; x = 7 if and only if x^2 = 49. c. if x2 = 49, then x = 7. false d. if x2 = 7, then x = 49. false